Hey, thanks for your interest in how we calculate an experience's ranking score. It's at the core of Rankers so I'm pleased you're curious.
The ranking score percentage is used to compare and sort experiences in ranking tables. It is not necessarily a direct measurement of the quality of a particular experience as rated by its customers. I've found it a useful tool to allow me to find the best experiences with confidence. But I've also found it important to read the customer reviews before making any final judgements!
We calculate an experience's ranking score using a multi-factor data model instead of a raw data average (mean). This model takes into account several important questions. For instance - is there a trusted body of reviews? What is the age of a review and is the review from a credible source?
Below you'll find details around some of the important factors that went into calculating the ranking score for Waitomo Glowworm Caves.
If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz. We don't believe this is perfect or complete so we're always interested in ways we might make improvements.
Waitomo Glowworm Caves
Valid Reviews
290 Valid Reviews
The Waitomo Glowworm Caves experience has a total of 291 reviews. There are 290 valid reviews that are included when calculating the ranking score and 1 invalid review that are excluded from the calculation. Reviews can be excluded only when a reviewer is not verified or after an investigation by our team determines the reviewer is not genuine.
Below is the distribution of ratings for the 290 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 36 |
|
12% |
| 9/10 | 52 |
|
18% |
| 8/10 | 81 |
|
28% |
| 7/10 | 66 |
|
23% |
| 6/10 | 22 |
|
8% |
| 5/10 | 13 |
|
4% |
| 4/10 | 8 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
1% |
| 1/10 | 3 |
|
1% |
75.62% Average
The raw data average (mean) for all the Waitomo Glowworm Caves valid reviews is 75.62% and is based on 290 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.
Face-to-Face Reviews
263 Face-to-Face Reviews
The Rankers team meets with travellers while they’re in New Zealand and conducts face-to-face surveys. These reviews, in our opinion, are the most trusted in the industry and represent a critical control sample. To our knowledge, we are the only travel review website in the world that has gone to this extent.
More about face-to-face reviews
Within the 290 valid reviews, the experience has 263 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 263 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 29 |
|
11% |
| 9/10 | 49 |
|
19% |
| 8/10 | 76 |
|
29% |
| 7/10 | 57 |
|
22% |
| 6/10 | 21 |
|
8% |
| 5/10 | 13 |
|
5% |
| 4/10 | 7 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
2% |
| 1/10 | 2 |
|
1% |
75.36% Average
The raw data average (mean) for all the Waitomo Glowworm Caves face-to-face reviews is 75.36% and is based on 263 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
75.87%
Rankers calculates a weighted mean as a base average on which we can improve. Individual review's ratings are given a weight based on several factors. The weight of a review determines the overall impact it'll have on the final weighted average.
Recent reviews have more weight as they are more relevant and reflect the experience as it currently operates. Over time reviews become less relevant and loose their impact on the ranking score.
Low rating reviews carry slightly less weight. This dampens the effect of very low ratings for every experience across the board. This is especially important when the experience has few reviews overall and a single negative rating can grossly mischaracterise an experience. Consistent poor reviews will still result in the experience receiving a comparitively low ranking score.
Credible sources provide reviews that can be trusted. If we have verified a reviewer is genuine via a face-to-face meeting then the review carries additional weight.
| Reviewer | Rating | Age | Relative Weight |
|---|---|---|---|
| Somysolanki | 7/10 | 503 days | 100% |
| Anne | 7/10 | 838 days | 70% |
| ros fraser | 4/10 | 2848 days | 2% |
| wynden | 1/10 | 2876 days | 1% |
| Rado Hank | 10/10 | 2963 days | 3% |
| Lizzie Edmonds | 8/10 | 2964 days | 3% |
| Anis Quentin | 7/10 | 2971 days | 3% |
| Jeny Smolders | 7/10 | 2975 days | 3% |
| Oscar Petersen | 8/10 | 2982 days | 3% |
| Ani | 9/10 | 3091 days | 3% |
| Martin Murlik | 8/10 | 3203 days | 3% |
| Laura | 9/10 | 3214 days | 3% |
| Melanie Farrell | 7/10 | 3222 days | 3% |
| Andy | 10/10 | 3229 days | 3% |
| Julia Achatz | 5/10 | 3243 days | 2% |
| Auba Mateos | 7/10 | 3249 days | 3% |
| Charlotte | 7/10 | 3249 days | 3% |
| Isabel Zedelius | 8/10 | 3252 days | 3% |
| Dries | 8/10 | 3292 days | 3% |
| Clarissa Glaser | 8/10 | 3293 days | 3% |
| Alna | 10/10 | 3298 days | 3% |
| Holger Worner | 9/10 | 3298 days | 3% |
| Karlee Hormell | 9/10 | 3307 days | 3% |
| Alonso | 9/10 | 3311 days | 3% |
| Rose Guillaume | 8/10 | 3314 days | 3% |
| Caroline Coudray | 8/10 | 3318 days | 3% |
| Barbara | 8/10 | 3318 days | 3% |
| Leonie Brabers | 7/10 | 3326 days | 2% |
| Bina Johansson | 10/10 | 3326 days | 3% |
| Sam Staines | 9/10 | 3330 days | 3% |
| Erik | 6/10 | 3333 days | 2% |
| Nicole Signer | 8/10 | 3340 days | 2% |
| Sam Taylor | 7/10 | 3344 days | 2% |
| Vanuxem | 8/10 | 3548 days | 2% |
| Clara Bertomeu | 10/10 | 3548 days | 2% |
| Lukas Boller | 9/10 | 3550 days | 2% |
| Mette Elholm | 7/10 | 3564 days | 2% |
| Mathilde Arp | 8/10 | 3564 days | 2% |
| Chloe and Guillame | 9/10 | 3568 days | 2% |
| Andre | 9/10 | 3570 days | 2% |
| Doerte | 10/10 | 3570 days | 2% |
| Saskia Peek | 9/10 | 3571 days | 2% |
| Erika Tarant | 8/10 | 3571 days | 2% |
| Jennifer Nguyen | 7/10 | 3572 days | 2% |
| Julie Duvert | 7/10 | 3572 days | 2% |
| Dan Ramsl | 4/10 | 3572 days | 1% |
| Lucy Mulvin | 7/10 | 3573 days | 2% |
| Fine Kochling | 9/10 | 3575 days | 2% |
| Eberhard | 9/10 | 3575 days | 2% |
| Hannes | 8/10 | 3576 days | 2% |
| Calum Penn | 9/10 | 3578 days | 2% |
| Arthur Portolleau | 6/10 | 3579 days | 2% |
| Elisabet | 10/10 | 3580 days | 2% |
| Tommy Mannien | 8/10 | 3581 days | 2% |
| Solange Bourbeois | 8/10 | 3584 days | 2% |
| Talissa Missiato | 10/10 | 3584 days | 2% |
| Severin Knegsch | 9/10 | 3585 days | 2% |
| Pierre Jouffineau | 10/10 | 3586 days | 2% |
| Lewis Whittle | 8/10 | 3588 days | 2% |
| Ben and Pauline | 8/10 | 3590 days | 2% |
| Ann-Kathrin | 7/10 | 3595 days | 2% |
| Natasha Harbinson | 10/10 | 3596 days | 2% |
| Sebastian | 2/10 | 3597 days | 1% |
| Jaquein Bucholz | 3/10 | 3597 days | 1% |
| Chiara | 7/10 | 3597 days | 2% |
| Cariotta Kemper | 3/10 | 3597 days | 1% |
| Megan Lenox | 7/10 | 3600 days | 2% |
| Max Mustermann | 8/10 | 3602 days | 2% |
| Amy Stafford | 8/10 | 3605 days | 2% |
| Carl | 7/10 | 3605 days | 2% |
| Briony | 7/10 | 3607 days | 2% |
| Melanie Kronbichler | 8/10 | 3608 days | 2% |
| Andreas Schiefer | 7/10 | 3609 days | 2% |
| Veronique Kaplan | 3/10 | 3611 days | 1% |
| Robin Ings | 6/10 | 3612 days | 2% |
| Stula Vladimir | 7/10 | 3613 days | 2% |
| David Soukal | 8/10 | 3613 days | 2% |
| Olivia Aliprandi | 7/10 | 3614 days | 2% |
| Isabelle | 2/10 | 3616 days | 1% |
| Jonathan Gourmel | 8/10 | 3616 days | 2% |
| Mikkel Palleson | 4/10 | 3619 days | 1% |
| Franziska and Sabine | 7/10 | 3620 days | 2% |
| Chloe Guerillot | 7/10 | 3620 days | 2% |
| Faye Oliver | 7/10 | 3622 days | 2% |
| Iris Kerbler | 9/10 | 3622 days | 2% |
| Til Schaebitz | 6/10 | 3623 days | 2% |
| Elisabeth Grabner | 9/10 | 3625 days | 2% |
| Berith | 10/10 | 3625 days | 2% |
| Chris Simpson | 6/10 | 3628 days | 2% |
| Pekka and Jonna | 9/10 | 3628 days | 2% |
| Jonas Hoerning | 8/10 | 3629 days | 2% |
| Nils | 10/10 | 3629 days | 2% |
| Mark Rosema | 8/10 | 3630 days | 2% |
| Lisa Huber | 10/10 | 3630 days | 2% |
| Nicola Wiggan | 9/10 | 3651 days | 2% |
| Linda and Gunther | 4/10 | 3652 days | 1% |
| Julie | 9/10 | 3653 days | 2% |
| Maria Schaer | 7/10 | 3657 days | 2% |
| Mette and Jesper | 5/10 | 3659 days | 1% |
| Pierre and Alexandra | 6/10 | 3665 days | 1% |
| Julia Waenninger | 8/10 | 3677 days | 2% |
| Sarah Boettcher | 9/10 | 3713 days | 2% |
| Suzanne Vermeulen | 6/10 | 3730 days | 1% |
| Blandine Giusti | 7/10 | 3933 days | 1% |
| Bart Hanssen | 6/10 | 4012 days | 1% |
| Astrid Egesten | 7/10 | 4064 days | 1% |
| Jean Curry | 9/10 | 4287 days | 0% |
| Carla Oyarzun | 1/10 | 4291 days | 0% |
| Philippe Chiasson | 9/10 | 4297 days | 0% |
| Helma Druyken | 4/10 | 4307 days | 0% |
| Florian Guttler | 7/10 | 4310 days | 0% |
| Casandra Prunica | 8/10 | 4311 days | 0% |
| Lauren Hedley | 7/10 | 4311 days | 0% |
| Janina Zwerver | 8/10 | 4311 days | 0% |
| Marieke Feyteres | 4/10 | 4315 days | 0% |
| van Linda Werner | 5/10 | 4315 days | 0% |
| Philip Donachie | 7/10 | 4325 days | 0% |
| Luisa Bach | 8/10 | 4325 days | 0% |
| Kristina | 7/10 | 4327 days | 0% |
| Eugen Lehner | 6/10 | 4328 days | 0% |
| Manuel Bach | 7/10 | 4328 days | 0% |
| Matthias Freiling | 2/10 | 4335 days | 0% |
| Debora Grusler | 6/10 | 4338 days | 0% |
| Andreas Brodhaeker | 8/10 | 4351 days | 0% |
| Renee van der Syde | 7/10 | 4352 days | 0% |
| Martha Horst | 8/10 | 4352 days | 0% |
| Roland Beer | 7/10 | 4356 days | 0% |
| Johanna Bak | 4/10 | 4356 days | 0% |
| Lior Bakski | 9/10 | 4366 days | 0% |
| Bet | 9/10 | 4367 days | 0% |
| Memain | 8/10 | 4640 days | 1% |
| Konza | 7/10 | 4641 days | 1% |
| Steen Rausmussen | 8/10 | 4672 days | 1% |
| David Restell | 10/10 | 4702 days | 1% |
| Christina Rodewald | 9/10 | 4707 days | 1% |
| Hanneke P | 7/10 | 4733 days | 1% |
| Kohler | 9/10 | 4753 days | 1% |
| Alexandra van den Brack | 6/10 | 4761 days | 1% |
| Paul Lawrence | 9/10 | 4762 days | 1% |
| Abby Rushmer | 7/10 | 4763 days | 1% |
| Stephan Olivier | 7/10 | 4768 days | 1% |
| Stephan Olivier | 7/10 | 4768 days | 1% |
| Faassen | 8/10 | 4772 days | 1% |
| Julie Lamart | 8/10 | 4773 days | 1% |
| Adrian Weidell | 5/10 | 4969 days | 1% |
| Jonathan Tuthill | 9/10 | 5024 days | 1% |
| A Ormsby | 10/10 | 5036 days | 1% |
| Gillian Rowe | 10/10 | 5049 days | 1% |
| Ryan Pynappels | 8/10 | 5050 days | 1% |
| Peter Dellen | 8/10 | 5051 days | 1% |
| Jorg Steffens | 8/10 | 5051 days | 1% |
| Danielle & Jobbe | 9/10 | 5053 days | 1% |
| Christina | 6/10 | 5054 days | 1% |
| Jop Veldhuis | 7/10 | 5054 days | 1% |
| Paul Weidenfeld | 8/10 | 5055 days | 1% |
| Sophie Dorrepaal | 7/10 | 5055 days | 1% |
| Fannette Peyreplane | 5/10 | 5056 days | 1% |
| Norm Cooper | 7/10 | 5060 days | 1% |
| Gloria, Rose & An | 8/10 | 5060 days | 1% |
| A Sorg | 10/10 | 5060 days | 1% |
| Samplonius | 5/10 | 5063 days | 1% |
| Petra | 10/10 | 5063 days | 1% |
| Bethany Hamilton | 8/10 | 5067 days | 1% |
| suffolkhouse69 | 9/10 | 5068 days | 1% |
| a a | 8/10 | 5099 days | 1% |
| Julia Balionis | 7/10 | 5113 days | 1% |
| Julia Hartman | 3/10 | 5114 days | 1% |
| Fabienne Indergand | 7/10 | 5134 days | 1% |
| Waldemar Schuler | 9/10 | 5146 days | 1% |
| pepette31 | 7/10 | 5221 days | 1% |
| Craig Hathaway | 9/10 | 5373 days | 1% |
| Stephane Lebel | 9/10 | 5378 days | 1% |
| Rens Hemselmans | 7/10 | 5391 days | 1% |
| Isabell | 10/10 | 5393 days | 1% |
| Holly Cave | 5/10 | 5393 days | 1% |
| J Palmer | 6/10 | 5397 days | 1% |
| Liz & Jim | 10/10 | 5399 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5401 days | 1% |
| Simon Vickers | 2/10 | 5404 days | 1% |
| Leslie | 8/10 | 5417 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5418 days | 1% |
| Selina Mueller | 7/10 | 5419 days | 1% |
| Tamlin Barton | 3/10 | 5420 days | 1% |
| Cara Dungay | 8/10 | 5421 days | 1% |
| Bottcher | 10/10 | 5421 days | 1% |
| Alexandra | 10/10 | 5422 days | 1% |
| Philipp Rau | 7/10 | 5424 days | 1% |
| Dan Aldridge | 9/10 | 5426 days | 1% |
| John Allen | 8/10 | 5428 days | 1% |
| Curtis Penner | 8/10 | 5428 days | 1% |
| Brandt | 8/10 | 5430 days | 1% |
| Nadia Husain | 5/10 | 5433 days | 1% |
| T J Andrews | 6/10 | 5449 days | 1% |
| Charli Skinner | 7/10 | 5700 days | 1% |
| Carl_Larsen | 10/10 | 5709 days | 1% |
| Susan & Richard | 10/10 | 5770 days | 1% |
| Rik | 9/10 | 5771 days | 1% |
| Jonathan Martin | 7/10 | 5773 days | 1% |
| Gunda G | 9/10 | 5778 days | 1% |
| Aaron | 8/10 | 5780 days | 1% |
| Will Jemma | 6/10 | 5783 days | 1% |
| Christen Hans | 10/10 | 5784 days | 1% |
| Monica and Danie. | 7/10 | 5792 days | 1% |
| Stephen | 5/10 | 5794 days | 1% |
| Susan | 10/10 | 5794 days | 1% |
| snodge | 8/10 | 5798 days | 1% |
| Bo Moenstead | 9/10 | 5807 days | 1% |
| Alain Deslandres | 8/10 | 5811 days | 1% |
| Jakob Jurgen | 10/10 | 5812 days | 1% |
| EA Anders | 8/10 | 5815 days | 1% |
| Helen and Hans Walser | 1/10 | 5818 days | 0% |
| kevinp | 8/10 | 5841 days | 1% |
| warrenp | 9/10 | 5845 days | 1% |
| braunweiler | 9/10 | 5849 days | 1% |
| pimn | 9/10 | 5854 days | 1% |
| asiacritics | 7/10 | 5860 days | 1% |
| Chris Mackamul | 8/10 | 5867 days | 1% |
| Debbie Rathbone | 10/10 | 5867 days | 1% |
| Lisette X | 9/10 | 5868 days | 1% |
| Martin | 10/10 | 5870 days | 1% |
| Thomas Willi | 10/10 | 5870 days | 1% |
| Elodie | 7/10 | 5871 days | 1% |
| richardh | 7/10 | 5985 days | 1% |
| trvlbug | 8/10 | 6013 days | 1% |
| glennandjen | 10/10 | 6074 days | 1% |
| BryonyS | 9/10 | 6092 days | 1% |
| Marion | 9/10 | 6109 days | 1% |
| Mikey | 7/10 | 6109 days | 1% |
| Richard Komzik | 6/10 | 6110 days | 1% |
| Michael Walsall | 10/10 | 6114 days | 1% |
| Anna | 8/10 | 6129 days | 1% |
| Abigail | 7/10 | 6129 days | 1% |
| lannie | 7/10 | 6138 days | 1% |
| SimonR | 8/10 | 6138 days | 1% |
| SonjaG | 7/10 | 6138 days | 1% |
| Chris | 8/10 | 6145 days | 1% |
| AurelieD | 8/10 | 6151 days | 1% |
| Yunker | 10/10 | 6153 days | 1% |
| Andrew | 8/10 | 6155 days | 1% |
| Erin | 9/10 | 6155 days | 1% |
| Christopher Gallaga | 8/10 | 6161 days | 1% |
| Amy | 10/10 | 6167 days | 1% |
| Shona | 8/10 | 6167 days | 1% |
| plumbaum | 9/10 | 6169 days | 1% |
| Sandra | 10/10 | 6177 days | 1% |
| Evangelista | 8/10 | 6177 days | 1% |
| Oliver | 5/10 | 6179 days | 1% |
| Kat | 9/10 | 6209 days | 1% |
| Lisa | 8/10 | 6236 days | 1% |
| siobhan | 8/10 | 6238 days | 1% |
| Alice | 8/10 | 6238 days | 1% |
| NORTZ | 7/10 | 6266 days | 1% |
| Stefan | 8/10 | 6268 days | 1% |
| Hugh Trenchard | 9/10 | 6284 days | 1% |
| Niamh | 4/10 | 6291 days | 1% |
| Jenny | 9/10 | 6315 days | 1% |
| Louise | 8/10 | 6324 days | 1% |
| Peddy | 10/10 | 6334 days | 1% |
| Katie Wise | 8/10 | 6337 days | 1% |
| Thomas Bachmann | 8/10 | 6353 days | 1% |
| Daniala | 8/10 | 6372 days | 1% |
| Tom Ben | 9/10 | 6475 days | 1% |
| Sarah Maudsley | 8/10 | 6490 days | 1% |
| Alan Bellerby | 8/10 | 6490 days | 1% |
| Tina Daly | 5/10 | 6496 days | 1% |
| John Woodrow | 8/10 | 6505 days | 1% |
| Ernst Seter | 9/10 | 6505 days | 1% |
| Jim Curley | 7/10 | 6516 days | 1% |
| Daniel | 7/10 | 6517 days | 1% |
| Marc Hertogs | 7/10 | 6520 days | 1% |
| Laura Sutton | 5/10 | 6544 days | 1% |
| Jeroen | 5/10 | 6546 days | 1% |
| Mum! | 6/10 | 6546 days | 1% |
| Gail | 9/10 | 6550 days | 1% |
| Heike Julia | 6/10 | 6551 days | 1% |
| Lanni | 8/10 | 6551 days | 1% |
| Amanda Finger | 7/10 | 6552 days | 1% |
| Desiree Muri | 7/10 | 6552 days | 1% |
| Jan Grzejik | 8/10 | 6579 days | 1% |
| Wouter Ewalts | 8/10 | 6586 days | 1% |
| Matilde | 6/10 | 6594 days | 1% |
| Kim | 6/10 | 6791 days | 1% |
| Gillian | 8/10 | 6833 days | 1% |
| Denise Nick | 6/10 | 6843 days | 1% |
| ranker_110 | 8/10 | 6862 days | 1% |
| Jasper | 7/10 | 6869 days | 1% |
| Mary | 8/10 | 6869 days | 1% |
| Lucy | 6/10 | 6869 days | 1% |
| Lukas | 8/10 | 6880 days | 1% |
| Hanna | 7/10 | 6882 days | 1% |
Adjustments
Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.
Sample Size Adjustment
No Adjustment
A reasonable number of reviews are necessary in order for the average to be credible and for an experience to take a prime position within the ranking tables. As such, experiences with only a few reviews have a moderated score. This does not mean that the experience or the reviews can't be trusted. The Waitomo Glowworm Caves experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-4.05% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 42 days. However the Waitomo Glowworm Caves experience does not meet the criteria for any adjustment.
In addition, an experience's ranking score may be adjusted for each day there is no new ranking. After 1 day the adjustment comes into effect. The maximum number of days that can be adjusted for is 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.
The Waitomo Glowworm Caves experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -3.99% |
| 198 | -4.01% |
| 199 | -4.03% |
| 200 | -4.05% |
| 201 | -4.07% |
| 202 | -4.09% |
| 203 | -4.11% |
| … | … |
Balancing Adjustment
6.05% Adjustment
Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.
You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.
We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.
Final Ranking Score
78%
The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.